Have FT-897 and the radio TUNE button will not work with YT-100 hooked up. Button works properly when my FC-30 or FC-40 instlalled. Might be able to modify LDG for remote button.
Since arrl.org upgraded their web page, I can not log in. Know name/password correct, use auto login with FF. Is this OM missing something or others having difficulty. Sent a email but no reply.
Check this web site www.qsl.net/k0bx/amp.html-5k Answers your questions for H/U to the TS-440. Although the instructions are for a TS-850, the interface works great with my TS-440. May have difficulty finding a 13pin din plug, look on the net.